Does telephone wire produces interfrence or bad reception if it is used for Cable TV reception?
I have used telephone wire in place of conventional coaxial cable to receive Cable TV. But the picture as well as sound quality I am getting is not good. Is it due to telephone wire and should I replace it with coaxial cable?
Yes, that’s a bad idea (using non-shielded cable in place of coaxial cable). The telephone wire is not shielded, and it will both give and receive interference, degrading the signal its carrying. Replace it with the right coax.